System MAX by Jakub Andruszkiewicz and Konrad Paluszek based on the concept by Lech Ohrysko
pass: 13+ PC, any distribution (but see 2 opening)
1: 8-12 PC, 1) no shortness, no 54 majors, no 6-card major or 2) 44(41) 3) (53)(41) 4) (42)(61) 5) 7-card minor with 2+, 2+
1: 0-7 PC, any distribution
1: 8-12 PC, shortness, 3-5 or 6+ , 3-
1: 8-12 PC, shortness, 3-5 or 6+ , 3-
1NT: 8-12 PC, (54)/55/(64) or 55/(64)
2: 8-12 PC, 3-4 , 3-4 , minor shortness, 5+ cards in the other minor
2: 5-card major, 5-card minor, at most 2 cards in the shorter major, 13-17 (18) PC
2: 8-12 PC, 55 with minor shortness/5M6m11 or
2: 8-12 PC, 55 with minor shortness/5M6m11 or
Vulnerable both 3/ and 2NT promise a 7-card suit
2NT: destructive preempt with clubs or diamonds
3: constructive preempt
3: constructive preempt
3: preempt
3: preempt
3NT: minor 7+-card with AKQJ, no honours highers than J aside (excluding single Qs)